LCOV - code coverage report
Current view: top level - builds/gnutls/coverage/gnutls-git/lib - mem.c (source / functions) Hit Total Coverage
Test: GnuTLS-3.6.14 Code Coverage Lines: 19 27 70.4 %
Date: 2020-10-30 04:50:48 Functions: 3 4 75.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :  * Copyright (C) 2001-2012 Free Software Foundation, Inc.
       3             :  *
       4             :  * Author: Nikos Mavrogiannopoulos
       5             :  *
       6             :  * This file is part of GnuTLS.
       7             :  *
       8             :  * The GnuTLS is free software; you can redistribute it and/or
       9             :  * modify it under the terms of the GNU Lesser General Public License
      10             :  * as published by the Free Software Foundation; either version 2.1 of
      11             :  * the License, or (at your option) any later version.
      12             :  *
      13             :  * This library is distributed in the hope that it will be useful, but
      14             :  * WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :  * Lesser General Public License for more details.
      17             :  *
      18             :  * You should have received a copy of the GNU Lesser General Public License
      19             :  * along with this program.  If not, see <https://www.gnu.org/licenses/>
      20             :  *
      21             :  */
      22             : 
      23             : #include "gnutls_int.h"
      24             : #include "errors.h"
      25             : #include <num.h>
      26             : #include <xsize.h>
      27             : 
      28             : gnutls_alloc_function gnutls_secure_malloc = malloc;
      29             : gnutls_alloc_function gnutls_malloc = malloc;
      30             : gnutls_free_function gnutls_free = free;
      31             : gnutls_realloc_function gnutls_realloc = realloc;
      32             : 
      33             : void *(*gnutls_calloc) (size_t, size_t) = calloc;
      34             : char *(*gnutls_strdup) (const char *) = _gnutls_strdup;
      35             : 
      36           0 : void *_gnutls_calloc(size_t nmemb, size_t size)
      37             : {
      38           0 :         void *ret;
      39           0 :         size_t n = xtimes(nmemb, size);
      40           0 :         ret = (size_in_bounds_p(n) ? gnutls_malloc(n) : NULL);
      41           0 :         if (ret != NULL)
      42           0 :                 memset(ret, 0, size);
      43           0 :         return ret;
      44             : }
      45             : 
      46             : /* This realloc will free ptr in case realloc
      47             :  * fails.
      48             :  */
      49      361514 : void *gnutls_realloc_fast(void *ptr, size_t size)
      50             : {
      51      361514 :         void *ret;
      52             : 
      53      361514 :         if (size == 0)
      54             :                 return ptr;
      55             : 
      56      361514 :         ret = gnutls_realloc(ptr, size);
      57      361514 :         if (ret == NULL) {
      58           0 :                 gnutls_free(ptr);
      59             :         }
      60             : 
      61             :         return ret;
      62             : }
      63             : 
      64      168277 : char *_gnutls_strdup(const char *str)
      65             : {
      66      168277 :         size_t siz;
      67      168277 :         char *ret;
      68             : 
      69      168277 :         if(unlikely(!str))
      70             :                 return NULL;
      71             : 
      72      168277 :         siz = strlen(str) + 1;
      73             : 
      74      168277 :         ret = gnutls_malloc(siz);
      75      168277 :         if (ret != NULL)
      76      168277 :                 memcpy(ret, str, siz);
      77             :         return ret;
      78             : }
      79             : 
      80             : #if 0
      81             : /* don't use them. They are included for documentation.
      82             :  */
      83             : 
      84             : /**
      85             :  * gnutls_malloc:
      86             :  * @s: size to allocate in bytes
      87             :  *
      88             :  * This function will allocate 's' bytes data, and
      89             :  * return a pointer to memory. This function is supposed
      90             :  * to be used by callbacks.
      91             :  *
      92             :  * The allocation function used is the one set by
      93             :  * gnutls_global_set_mem_functions().
      94             :  **/
      95             : void *gnutls_malloc(size_t s)
      96             : {
      97             :         int x;
      98             : }
      99             : 
     100             : /**
     101             :  * gnutls_free:
     102             :  * @ptr: pointer to memory
     103             :  *
     104             :  * This function will free data pointed by ptr.
     105             :  *
     106             :  * The deallocation function used is the one set by
     107             :  * gnutls_global_set_mem_functions().
     108             :  *
     109             :  **/
     110             : void gnutls_free(void *ptr)
     111             : {
     112             :         int x;
     113             : }
     114             : 
     115             : #endif
     116             : 
     117             : /* Returns 1 if the provided buffer is all zero.
     118             :  * It leaks no information via timing.
     119             :  */
     120        1626 : unsigned _gnutls_mem_is_zero(const uint8_t *ptr, unsigned size)
     121             : {
     122        1626 :         unsigned i;
     123        1626 :         uint8_t res = 0;
     124             : 
     125       85098 :         for (i=0;i<size;i++) {
     126       83472 :                 res |= ptr[i];
     127             :         }
     128             : 
     129        1626 :         return ((res==0)?1:0);
     130             : }

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